Method and apparatus for providing concrete structures.



Patented. Apr. 22, 19M

2 SHEETS-SHEET I.

IVI. HIRSCHTHAL. METHOD AND APPARATUS FOR PROVIDING CONCRETE STRUCTURES.

A APPLICATION FILED SEPT. 13 |916.. www@ M. HIRSCHTHAL.

METHOD ANDA APPARATUS FOR PROVIDING CUNCHETE STRUCTURES.

APPLICATION FILED sEPT.13.1916.

LSLL Patented Apr. 22, 1919.

' y 2 SHEETSTSHEET 2.

` M. Hw Ecmhl fla till

f or roof slabs.

g a entre ritme oramai fil/IE HIRSCH'I., OF NEW YORK, N. Y., ASSGNOR OF ONE-THIRD TO FRANK D.

, HYDE, 0F NEW YORK, N. Y.

METHOD AND APPARATUS FOR PROVIDIING CONCRETE STRUCTURES.

`Application filed September 13, 1916. Serial No.

To all whom t may concern:

Be it known that ll, MEYER HIRSGHTHAL, a citizen of the United States, and a resident of' New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in--Methods and Apparatus for Providing `Concrete Structures, of which the following is a specication.- l

My present invention relates to a method and apparatus for providing concrete structures, such as oce and commercial buildings, barns, garages, sewers, tunnels, tanks, silos, grain elevators, bridges, trestles, and in fact, practically any structure embodying uprightsI and doors, or roofs, or both.

The principal object of my invention is lto provide structures of the character described, embodying concrete or cementitious material which is placed while in a semiduid state and which becomes set in operative relation to permanent supports, such as walls, columns, abutments, piers, etc., to form tloors or roofs, by a method and apparatus avoiding the use of temporary posts or uprights, technically known as shores or struts, which are expensive to erect and which impede trafhc below the forms for the reinforced concrete before, during, and after the placing of the concrete or cementitious material. This object is accomplished by utilizing permanent uprights to support temporary girders, beams or the like, which in' turn support the forms for concrete door When there is taken into consideration the fact that forms for door .or roof slabs up to six feet span, must be left intact for approximately sin days in summer after placing the concrete, and approximately two weeks in cold weather, the space below the forms, where shores or struts are used, can not be readily utilized for carrying on business, as in buildings, providing a way for trame, as under bridges, trestles, etc., or for conveying material such as in sewers, culverts, ete. en construction is carried on according to my method and utilizing apparatus constructed and arranged according to my invention, after the permanent uprights have been placed, such as walls, the same may serve a dual function as a means for providing lateral protection for vgoods in inclement weather, defining a passage or way for traffic, or for confining liquid to a predetermined path of Specication of Letters Patent.

and in which drawin movement Patented Apr. 22, Italia), nasse.

as in sewers or storing the same as in the case of tanks, While the superstructure, such as floors and roofs are being permanently placed.

Other objects of my invention will appear in the following `detailed description, taken in connection with the accompanying drawings,'forming a part of this specification,

Figure l is a view artly in elevation and partly in section through a structure, showing one method of construction, parts being broken away and removed, to condense'the view.

Fig. 2 isa view partly in plan and partly in horizontal section through the structure shown in Fig. l, parts being broken away and removed to disclose details.

Fig. 3 is an enlarged central vertical sectional view through an upright of concrete, showing forms, cores, and ledges in operative relation thereto.

ig. 4ris a view similar to Fig. 3 showing the cores and forms removed and with the ledges detachably secured to the' upright, and a temporary supporting member in operative relation to one of the ledges.

F ig. 5 is a view similar to Fig. 3 disclosing a modified form of ledge.

Fig. 6 is a view partly in elevation and partly in central vertical section through the form shown in F ig.5, but with the concrete forms removed, the ledges detachably secured to the column and a spacer interposed between the temporary member and the le ge.

A Fig. 7 is a view similar to Fig. 3, showing the forms removed and with the ledges integral with the uprights.

Fig. 8 is a view partly in elevation and partly in vertical section through a floor slab, and showing ornamental llershetween the ledges of the upright and the under face of the floor slabu structures C; G concrete slabs formed vupon the temporary forms F; H reinforcement for slabs Gr where deemed necessary; J a s acer between the structures C and ledges where deemed necessary; and l a'ller interposed between ledge B and slab F after any suitable forms as is indicated in Fi s. 3

' rights A. in

and 5, in the former 'of which the ledge is in the form of a rolled steel or iron angle section, one leg of which serves as a part' of the form in the provision of upright A. lin Fig. 5 a modified form of ledge is disclosed, in the form of a channel section,` the weby 12 of which serves asl a part of the form in prov viding the upright A. The ledges may be perforated as at 13, to receive cores 14: which extend transversely through the columns in order to provide ways l5 for bolts 16 clearly shown in-Figs. 4 and 6, after the forms l0 and cores 14E have been removed, the bolts 16, in combination with nuts 17, providing simple and ecie'nt means for detachably se- Curing thev ledges B to the columns, or up- Fig. 7, the upright A is disclosed as provided ywith ledges B integral with the main body portion of the uprights and said ledges may or may not be reinforced, depending upon the load coming thereupomas hereinafter set forth.

llf the uprights A are of concrete or embody a cementitious material, no appreciable weight is brought thereupon until the cementitious material has thoroughly set and the upright is not only self-sustaining but also capable of supporting a dead load such as the temporary supportingstructures C, temporary forms F and the concrete slabs KCr with reinforcement H where deemed necessary, which are pro essively placed.

Referring now to t e temporary support.- ing structures C, while l have herein shown the same as embodying irders D and beams E, it is to be understood that much will depend upon the span or distance between the spaced uprights A, as to just what form of temporary structure should be provided and the material used, or embodied in said strucl ture. The girder D is shown in the form of an I-shaped rolled steel section, while the beams E are of wood, extending transversely of the girders, the latter being supported by the uprights A through the intermediacy of ledges B. Where the span isl great, or where the load is rather excessive, ya spacer d' clearl shown in Fig. 6 of the drawings, may e provided between the supporting C will slab. These boards may recrear wardly on the inclined face of the lower wedge, the temporary supporting'structure be raised. lf, the wedges are moved in counter directions, said structure will be lowered. A spacer J may be provided intermediate the supporting structure at eachv ledge and facilitates arranging of the upper faces of beams E in the desired plane, and also facilitates diismemfbering of the tcmporary structureafter-it has served its purose.

After the temporary lsupporting structure C has been placed in operative relation to the uprights A, the temporary forms Vfor the floor o r roof slabs are arranged upon the structure C, said forms, in the example shown, consisting of boards v'19 arranged transversely of the beams E, the boardsengaging laterally in a manner to prevent loss of cementitious material or concrete which is placed thereupon, to form the floor or roof be thoroughly tied together so that the pressure of the concrete or the movement of men machinery, or materials shall not throw them out of place.

After the forms are in place, if reinforcing materials, such as rods, fabricated metal, or tiles, are to be used as a part of the door slabs, they are placed, and where necessary, securely anchored tothe uprights A, the cementitious material of which may be completed to approximately the line 20 rior to the placing of the slab Cr. This is fldllowed by placing the cementitious material or concretein a semi-fluid state, upon the forms F, where it is allowed to hardenand become self-sustaining before the temporary structures and forms are removed. llt is to be observed that, during the assembling of the reinforcement H and the placing of the concrete/upon the form F, there is ample head,

be initially lowered lby operating thev spacers J'wherever they occur.

While l have herein shown and described the ledges of rolled steel or iron sections, or of reinforced concrete, itis tobe understood that these ledges may be of any suitable material, either permanently or detachf :asomar l ,3.

ably carried by the uprights and further more, if made of material such as concrete, they may be chipped away after they have served their purpose, or in the. event it is desired to permit them to remain, an ornamental iller K may be interposed between the ledge B and thevunder face of the Hoor or roof slab, giving an ornamental eitect and the appearance of a capital as in the case of columns or piers forming the uprights.

Changes in details may be made Without departing from the spirit or scopeof my invention; but,

I claim l. The method of erecting cementitious structures, comprising forming permanent spaced columns for the structure, mounting ledges directly and detachably on the columns, supporting removable centering on the' ledges, and molding a `connecting slab onI the centering integral with the columns.

2. In an apparatus for application to permanent columns for forming slabs thereon, the combination of ledges detachably supported by the columns, and removable centering carried on the ledges.

,3. The method of detachably securing' ledges to permanent cementitious uprights, comprising erecting a form for the cementitious material including the ledges as a part ofthe form' and placing core 'rods in the form with the ends projecting through the ledges, and substituting detachable bolts for said core rods after the material is set.

. 4. In an apparatus for application to permanent columns for forming slabs thereon, the combina-tion of ledges detachably supported bythe columns, girders seated upon said ledges, beams engaging across the girders, and forms supported `upon said beams.

MEYER HIRSCHTHAL. 

